Overwhelmed... Is my calculation/my knowledge correct!?

If they don't like it, they have to play at their friends' place, who hopefully then have a bigger room.

I find that downright cheeky. Outsourcing the playing offspring to the neighbors because you'd rather have a 20 sqm bedroom yourself. That's one way to make yourself popular... (I remember neighbor kids who didn't have a TV at home; the parents thought that was bad and bragged about raising their kids TV-free. The dear little ones regularly showed up at the neighbors; not to play with the kids there, but to sit in front of the neighbor's TV. Those two kids were very popular when they came. Everyone knew why)

Regarding the location of the children's room/bedroom, I also agree with my predecessors. What do I do in a bedroom? I go in in the evening and out again in the morning. That's it. Why would I need a ballroom there?

And I don't even have children myself, but I would never plan like THAT...

I find that downright cheeky. Outsourcing playing children to the neighborhood because you'd rather have a 20 sqm bedroom yourself. That's one way to make yourself popular... (I remember neighborhood kids who didn’t have a TV at home; the parents thought it was bad and bragged about raising their children TV-free. The dear little ones regularly showed up at the neighbors’ place—not to play with the kids there, but to sit in front of the neighbor’s TV. They were very popular, those two kids when they came. Everyone knew why)

Regarding the location of the children's room/bedroom, I agree with my predecessors. What do I do in a bedroom? I go in at night and come out in the morning. That’s it. Why would I need a dance hall there?

And I don't even have children myself, but I would never plan like THAT...

Regarding your "accusations," I have already commented above.

But I am amazed at how much some people sugarcoat their children from my perspective. Does a teenager need a couch and a small table next to their bed? Does it really need to be a 15 sqm room to nearly set up an apartment there? Why are 4 sqm of play space no longer enough for playing with Lego these days? Our teenager moves around an 8 sqm area in his current 20 sqm room. He doesn’t use the rest at all. He’s even looking forward to his smaller room. "Then I won’t have to walk so far anymore." And the youngest shoots through the living room and hallway on his balance bike, chases the cats, or plays in his play corner (1x1.5 m rug in the living room).

For the OP: From the discussion that threatens to miss your topic, you can deduce that you should think carefully about what you really need. If you don't have children yet, it's a bit hard to estimate. I always had the idea that the kids would play in the kids’ room. Well, now it’s mainly the living room. Define clearly for yourselves what is important to you. Maybe think not only about the children but also about yourselves. YOU still live there when the kids have long since moved out. YOU will still be paying it off then.

So now I’ll send you the list first.

Again the same argument. Why isn’t a 110 sqm house enough instead of 150 sqm? Why not a 5 sqm bathroom instead of 10 sqm? Quite simply, because bigger is better (OK, at some point that certainly flips). The same applies to the children's rooms. A bigger children's room is better than a small one, the same goes for bedrooms, living rooms, and other rooms. Even your youngest would prefer a big room over a small one, of course you have to talk yourself into some things. At the latest when the girlfriend comes over, a bed at least 1.40 m wide, a desk, a larger wardrobe, TV shelf, a small corner for cozy private sitting, etc. is needed (or the teenager wants it), this point comes up. But of course, you can always convince yourself smaller=better.

Evolith, this is the first time I've spoken up here...

Exactly, I primarily live there, which is why, for example, I planned our bedroom in the north. A third room facing south. We use it (since we have no children) as a hobby/workroom for ourselves, and I use it during the day; sleeping at night, and I prefer it cooler in the room and don’t need sun or much more space than just enough for our bed to fit well (and, if you don’t have a walk-in closet, enough space for a wardrobe).

Especially when I consider that the children won’t live in the house forever, I would carefully think about what I can do with these rooms FOR MYSELF then. For many couples, it develops so that at some point they sleep separately (because one starts snoring terribly). A good solution then is if you can put double beds in both rooms (after all, you don’t want to always sleep apart and want all options), but I don’t know how that is supposed to work with 10 sqm. I can then use the former children's room as a guest room; it also makes sense there if you can at least fit a smaller double bed (the children might visit again sometime and possibly as a couple). I can use one room as a hobby/workroom and then, as mentioned above, I find a room in the brighter location facing the garden more useful, since it is used during the day, unlike the bedroom.

Especially when you consider how you can use children's rooms after the child-rearing phase, such a planning is out of the question.

I wonder how little most people spend time in the bedroom. For me, a large bedroom is important. I iron the laundry there and like to watch a movie in bed in the evening; for that, 12 sqm would be far too small.

Best regards
Sabine

Bigger is always possible. But the wishes were NOT for a bigger children's room but for a spacious living area. I wonder how I managed it. Later my 12 sqm room with a normal bed. Visitors slept on a mattress next to me. My boyfriend cuddled up to me sleeping in my single bed with me. I had a huge desk with 2 PCs on it, a 180l aquarium with a cabinet underneath, a chest of drawers with a TV on it, and a living room wall unit with a wardrobe and shelves for my books. There was still room for a bean bag. And I never felt my room was small. There would theoretically have been room for a big bed. Well, a piano wouldn't have fit anymore. That would have had to go into the living room.